A post shared by Helen George (@helenrgeorge) on Oct 2, 2017 at 12:13am PDT

The photo also appears to show fellow Call The Midwife star Charlotte Ritchie, who plays Barbara Gilbert, looking on in the background.

George and Ashton, who plays Tom Hereward, reportedly got together while filming for the show in South Africa last year.

The 33-year-old had kept the news of her pregnancy under wraps until last month, when she stepped onto the red carpet of the TV Choice Awards in London, showing off her baby bump in an elegant black gown.

A post shared by Helen George (@helenrgeorge) on Sep 6, 2017 at 10:52am PDT

She informed her social media followers that she would be keeping the sex of her first baby as a surprise.

In an Instagram post displaying a table full of gifts from her colleagues, she wrote: “Beautiful send off from the best crew #callthemidwife- no plans to leave the show just a bit of time off. And the sex will be a surprise to us all…boys can wear pink too.”